March 14, 2014
The more things change, the more they stay the same...
This 1961 video (16mm film) from the Dept of Defense does an excellent job explaining the difference between single-phase and 3-phase power. It even discusses 2-phase power used in radar. Although it got a little too deep for my purposes towards the end, this is a great teaching tool. The visuals are still accurate today, albeit they are in B&W.